you are filling in y= mx + b
m= slope and b= y-intercept
start by finding where the line intercepts the y axis.
it crosses at (0,-6)
2. find a perfect point on the graph and move up then over until you reach another perfect point. However many times you go up, is your numerator and left or right is your denominator.
For this equation it is 3/1, it can simplify to 3. This number is the slope.
Finally, fill the numbers into the equation.
So the answer is y= 3x - 6